Hardening flags

[Julien ÉLIE]

Hi Russ,
>> As for Perl, default is static.
>> One needs to run "./Configure -Duseshrplib" so as to have a shared library.
> 
> Oh, huh.  Okay, yes, that does push me a bit more towards saying it
> wouldn't be a horrible idea to document this somewhere (although I still
> suspect most people aren't building Perl themselves).

I suggest to add a sentence in INSTALL, where we speak of configure 
options like --with-perl.

-- 
Julien ÉLIE

« Il ne faut jamais gifler un sourd : il perd la moitié du plaisir. Il
   sent la gifle mais il ne l'entend pas. » (Georges Courteline)